The Seiko 8420-5910 is a watch model based on the 8420 movement.
Parts List
| ES6N88SM01 | crystal |
| 22N04NA1 | crown |
| 0G1800N01 | case back gasket |
| DZ0030B01 | case back gasket |
| BDA07 | band - leather band |
| 0354816 | others - setting/winding stem |
| 82706540 | others - case ring |
| 84201990XG14 | others - dial |
| 84201990XS14 | others - dial |
| 8420591025 | others - case |
| B080AS | others - push pin |
| 04V02DGM | others - minute hand |
| 04V02DGH | others - hour hand |
Caliber 8420
